It all depends on what is wrong with it but most of the time you have to tear it apart to replace parts in it and if you have never done it your better off just buying a new one.
ask the local wal mart
first check to see if your getting spark, or fuel
where is the fuel filter on a 91 Chevy camaro 3.1 v6 have the injectors cleaned and purged by your mechanic or if that doesnt work just replace the injectors
First you have to locate the source of the vibration before you can fix it.
alternator is probably not charging. you need to fix this NOW. new alternator is likely the only repair.
Bad ECU, replace.
REMOVE ALTERNATOR FROM DRIVERS SIDE OF ENGINE BLOCK.
i have a 1992 camaro rs, they play in mine went away after replacing the bushings on the front lower control arms and bushings
Replace the seat belt.
change the ignition switch the little black thing on your key is wore down and not making good contact that should fix the problem
when can fix alternator in namibia
if u are asking about a misfire..then first do a tune up...as u pull each plug look foe something wrong..like oil on a plug.